Question
Mercalli scale and Richter scale.
| Mercalli scale | Richter scale |
| (i) It measures the intensity of earthquake. | (i) It measures the energy released during an earthquake. |
| (ii) The measurement is based on observed effects. | (ii) The measurement is done with the help of seismograph. |
| (iii) Quantified from observation of the effects on earth’s surface, human beings, objects and man- made structures. | (iii) Quantified from logarithmic scale obtained by calculating logarithm of the amplitude of waves. |
| (iv) Unit of measurement I (not felt) to XII (total destruction) | (iv) Unit of measurement from <2.0 to 10.0 + (never recorded) 3.0 earthquake releases 32 times more energy than a 2.0 earthquake. |
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